Add shadergraph dependency to main repo project

Author: Pauliusd01

Packages/manifest.json

@@ -6,6 +6,7 @@
     "com.unity.ide.rider": "3.0.31",
     "com.unity.ide.visualstudio": "2.0.22",
     "com.unity.settings-manager": "1.0.3",
+    "com.unity.shadergraph": "14.0.12",
     "com.unity.test-framework": "1.4.5",
     "com.unity.test-framework.build": "0.0.1-preview.12",
     "com.unity.test-framework.performance": "3.0.3",